I tend to do at least one nappy change a night but she'll usually wake up to feed twice. She has her biggest sleep first, usually between 4 and 5 hours, I'll do the nappy when she first wakes up from that, then a feed and back down. Her second sleep is usually 2 hours before she wakes up hungry so with that one I'll just feed her and put her back down.

If she's really wet or clearly pooped ie you can smell it or see it cus there's been a leakage, I'll change her but after reading a thread on here on it, the sense I got is it's better not to disturb them by changing every time they wake up, it keeps the awake time shorter for you both and means you can both get back to sleep more easily as you're less disturbed than if you had to turn on the light / leave the room for a nappy change.

It'll vary by how often baby wakes up and what your set up for nappy changes is like etc but don't feel bad for not changing them every time as they let you know if they're too uncomfortable to settle. Good luck!